Amazon's Good Omens — Behind-the-Scenes Sneak Peek

Amazon Studios has released an early behind-the-scenes preview for "Good Omens," the new series based on the award-winning 1990 novel of the same name, which was co-authored by the late fantasy writer Terry Pratchett and famed comic book writer Neil Gaiman.

Set to star David Tennant (Doctor Who), Michael Sheen (Masters of Sex), and Jon Hamm (Mad Men), the six-episode series is currently in production and set to premiere sometime next year.

The offbeat fantasy, in which Gaiman is serving as one of the executive producers, focuses on the unlikely partnership between the demon Crowley (Tennant) and the angel Aziraphale (Sheen), who have agreed to work together to prevent the antichrist, an 11-year-old boy, from setting off Armageddon.

The series will also star Michael McKean (Better Call Saul), Mireille Enos (The Killing), Miranda Richardson (Harry Potter and the Goblet of Fire), Adria Arjona (Pacific Rim Uprising), Derek Jacobi (Murder on the Orient Express), Nick Offerman (Parks and Rec), and many more.

It was just announced that two-time Oscar-winner Frances McDormand (Fargo, Three Billboards...) has been cast as the voice of God.

British TV helmer Douglas Mackinnon (Doctor Who, Outlander) is directing the entire series, which will premiere sometime in 2019 to be stream on Amazon in the U.S. and to air on BBC in the U.K.

synopsis: The End of the World is coming, which means a fussy Angel and a loose-living Demon who've become overly fond of life on Earth are forced to form an unlikely alliance to stop Armageddon. But they have lost the Antichrist, an 11-year-old boy unaware he's meant to bring upon the end of days, forcing them to embark on an adventure to find him and save the world before it's too late.